Taken in an Australian dressing station near Ypres, Belgium in 1917, the wounded soldier in the lower left of the photo has a dazed thousand-yard stare.

The thousand-yard stare or two-thousand-yard stare is a phrase coined to describe the limp, blank, unfocused gaze of a battle-weary soldier, but the symptom it describes may also be found among victims of other types of trauma. A characteristic of shell shock, the despondent stare reflects dissociation from trauma. The thousand-yard stare is thus often seen in cases of incipient post-traumatic stress disorder. It does not necessarily indicate PTSD, however, nor will it always appear in persons who will later develop PTSD.[citation needed]

He left the States 31 months ago. He was wounded in his first campaign. He has had tropical diseases. He half-sleeps at night and gouges Japs out of holes all day. Two-thirds of his company has been killed or wounded. He will return to attack this morning. How much can a human being endure?[3]

When recounting his arrival in Vietnam in 1965, then-Corporal Joe Houle said he saw no emotion in the eyes of his new squad: "The look in their eyes was like the life was sucked out of them." Later learning that the term for their condition was the 1,000-yard stare, Houle said, "After I lost my first friend, I felt it was best to be detached."[4]